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// Ӳ����ʱ��Դ��
#include "ls1c_public.h"
#include "ls1c_pin.h"
#include "ls1c_clock.h"
#include "ls1c_regs.h"
#include "ls1c_pwm.h"
#include "ls1c_timer.h"
// ��ʱ���м�����(CNTR��HRC��LRC)�����ֵ
#define TIMER_COUNTER_MAX (0xffffff)
/*
* ��ȡָ����ʱ���ļĴ�������ַ
* @timer Ӳ����ʱ��
* @ret ����ַ
*/
unsigned int timer_get_reg_base(ls1c_timer_t timer)
{
unsigned int reg_base = 0;
switch (timer)
{
case TIMER_PWM0:
reg_base = LS1C_REG_BASE_PWM0;
break;
case TIMER_PWM1:
reg_base = LS1C_REG_BASE_PWM1;
break;
case TIMER_PWM2:
reg_base = LS1C_REG_BASE_PWM2;
break;
case TIMER_PWM3:
reg_base = LS1C_REG_BASE_PWM3;
break;
}
return reg_base;
}
/*
* ��ʼ����ʱ��������ʼ��ʱ
* @timer_info ��ʱ���Ͷ�ʱʱ����Ϣ
*/
void timer_init(timer_info_t *timer_info)
{
unsigned int timer_reg_base = 0; // �Ĵ�������ַ
unsigned long timer_clk = 0; // Ӳ����ʱ����ʱ��
unsigned long tmp;
unsigned int ctrl = 0; // ���ƼĴ����еĿ�����Ϣ
// ����
if (NULL == timer_info)
{
return ;
}
/*
* �Ѷ�ʱʱ�任��Ϊ��������ֵ
* ������ֵ = ��ʱ����ʱ�� * ��ʱʱ��(��λns) / 1000000000
* ��о1c�Ķ�ʱ��ʱ��ΪAPBʱ�ӣ��ﵽ126Mhz��
* Ϊ���������̷����������������ֶ��Ż�����ļ���ʽ��Ҳ���Բ��ø�������
*/
timer_clk = clk_get_apb_rate();
tmp = (timer_clk / 1000000) * (timer_info->time_ns / 1000); // ��1000000000���Ϊ1000000��1000
tmp = MIN(tmp, TIMER_COUNTER_MAX);
// ���ƼĴ�����Ϣ
ctrl = (1 << LS1C_PWM_INT_LRC_EN)
| (0 << LS1C_PWM_INT_HRC_EN)
| (0 << LS1C_PWM_CNTR_RST)
| (0 << LS1C_PWM_INT_SR)
| (1 << LS1C_PWM_INTEN)
| (1 << LS1C_PWM_SINGLE)
| (1 << LS1C_PWM_OE)
| (1 << LS1C_PWM_CNT_EN);
// ���ø����Ĵ���
timer_reg_base = timer_get_reg_base(timer_info->timer); // ��ȡ�Ĵ�������ַ
reg_write_32(0, (volatile unsigned int *)(timer_reg_base + LS1C_PWM_HRC));
reg_write_32(tmp--, (volatile unsigned int *)(timer_reg_base + LS1C_PWM_LRC));
reg_write_32(0, (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CNTR));
reg_write_32(ctrl, (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
return ;
}
/*
* �ж�ָ����ʱ���Ƿ�ʱ(ʵ�ֶ�ʱ)
* @timer_info ��ʱ��
* @ret TRUE or FALSE
*/
BOOL timer_is_time_out(timer_info_t *timer_info)
{
unsigned int timer_reg_base = 0; // �Ĵ�������ַ
unsigned int ctrl; // ���ƼĴ�����ֵ
// ����
if (NULL == timer_info)
{
return FALSE;
}
// ��ȡ���ƼĴ���
timer_reg_base = timer_get_reg_base(timer_info->timer);
ctrl = reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
// �ж��ж�״̬λ
if (ctrl & (1 << LS1C_PWM_INT_SR))
{
return TRUE;
}
else
{
return FALSE;
}
}
/*
* ֹͣ��ʱ��
* @timer_info ��ʱ��
*/
void timer_stop(timer_info_t *timer_info)
{
unsigned int timer_reg_base = 0;
// ����
if (NULL == timer_info)
{
return ;
}
timer_reg_base = timer_get_reg_base(timer_info->timer);
reg_write_32(0, (volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL));
return ;
}
/*
* ��ȡ��ʱ���ӳ�ʼ�������ڵ�ʱ��(ʵ�ּ�ʱ����)����λns
* @timer_info Ӳ����ʱ��
* @ret ʱ�䣬��λns
*/
unsigned long timer_get_time_ns(timer_info_t *timer_info)
{
unsigned int timer_reg_base = 0;
unsigned int cntr = 0; // �Ĵ���CNTR��ֵ
unsigned long time_ns = 0; // ʱ�䣬��λns
unsigned long timer_clk = 0; // ��ʱ��ʱ��
// ��ȡ�Ĵ���CNTR��ֵ
timer_reg_base = timer_get_reg_base(timer_info->timer);
cntr = reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CNTR));
/*
* ��CNTRֵ����Ϊʱ�䣬��λus
* ʱ�� = (������ֵCNTR * 1000000000) / ��ʱ��ʱ��Ƶ��
* Ϊ�������������ֶ��Ż���ʽΪ ʱ�� = (������ֵCNTR * 1000) / (��ʱ��ʱ��Ƶ�� / 1000000)
*/
timer_clk = clk_get_apb_rate();
time_ns = (cntr * 1000 ) / (timer_clk /1000000);
// myprintf("[%s] time_us=%lu, cntr=%d, timer_clk=%d\n", __FUNCTION__, time_ns, cntr, timer_clk);
return time_ns;
}
/*
* ��ӡtimer��ؼĴ�����ֵ
* @timer_info Ӳ����ʱ��
*/
void timer_print_regs(timer_info_t *timer_info)
{
unsigned int timer_reg_base = 0;
timer_reg_base = timer_get_reg_base(timer_info->timer);
myprintf("CNTR=0x%x, HRC=0x%x, LRC=0x%x, CTRL=0x%x\n",
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CNTR)),
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_HRC)),
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_LRC)),
reg_read_32((volatile unsigned int *)(timer_reg_base + LS1C_PWM_CTRL)));
return ;
}
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